How to get started on Nano Server

Brief description of your issue

I recently wanted to try out bootstrapping a Nano Server instance with Microsoft.WinGet.Client, but it fails to install. After curl-ing PS7, when installing the winget PS wrapper I get:

PS C:\Users\ContainerUser> Install-Module -Name Microsoft.WinGet.Client -AllowPrerelease -Scope CurrentUser
A
Install-Package: The module 'Microsoft.WinGet.Client' cannot be installed or updated because the
authenticode signature of the file 'Microsoft.WinGet.Client.psd1' is not valid.

Even if this were to pass, I may actually have the client be missing (IIUC the PS module just wraps the exe using Crescendo), but there are only msixbundle releases which AFAIK can't be installed on Nano Server.

Is there a way to make use of Winget on Nano Server or must people keep resorting to ZIP packages?

Start by checking how Microsoft.WinGet.Client is installed on Nano Server and whether the msixbundle releases can be used there. Compare the reported Authenticode failure with the ZIP packages mentioned in the issue; done means documenting a supported way to use WinGet on Nano Server or confirming that ZIP packages remain required.